Lumbar support



FIG. 1 is a front perspective view of a lumbar support of the presentinvention, showing my new design;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a bottom plan view thereof; and,

FIG. 4 is a side elevation view thereof, a portion of a chair back beingshown in broken lines for environmental purposes only and forming nopart of the claimed design.

The ornamental design for a lumbar support, as shown and described.